Issue 23, 2014
From the journal:

Analytical Methods

Portable platform for rapid and indirect photometric determination of water in ethanol fuel samples†

Gabriela Furlan Giordano,ab   Danielle Cristhina Melo Ferreira,a   Thiago Ribeiro de Carvalho,b   Luis Carlos Silveira Vieira,a   Maria Helena de Oliveira Piazzetta,a   Renato Sousa Lima*ab  and  Angelo Luiz Gobbia  

* Corresponding authors

a Laboratório de Microfabricação, Laboratório Nacional de Nanotecnologia, Centro Nacional de Pesquisa em Energia e Materiais, São Paulo, Campinas, Brasil
E-mail: renato.lima@lnnano.cnpem.br, angelo.gobbi@lnnano.cnpem.br

b Instituto de Química, Universidade Estadual de Campinas, São Paulo, Campinas, Brasil

Abstract

We have developed a simple, fast, portable, inexpensive, and indirect method for the determination of water in ethanol fuels. The addition of an excess amount of water is the most simple and common method of adulterating these fuels. Such procedure can adversely affect the performance of the vehicle. Our system uses a laboratory-made photometry device to monitor the formation of complexes between ethanol and cerium(IV). These reactions produce deep orange–red solutions. The limit of detection and the analytical sensitivity were estimated to be 0.22% v/v (water in ethanol) and 0.11 (% v/v)−1, respectively. The developed platform was satisfactorily robust with respect to the changes in temperature and stability of the reagents during storage. The measurements were accurate at the 95% confidence level compared with data obtained by Karl Fischer titration.

Graphical abstract: Portable platform for rapid and indirect photometric determination of water in ethanol fuel samples

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Article information

DOI
https://doi.org/10.1039/C4AY02255F
Article type
Technical Note
Submitted
24 Sep 2014
Accepted
03 Oct 2014
First published
06 Oct 2014

Anal. Methods, 2014,6, 9497-9502

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Portable platform for rapid and indirect photometric determination of water in ethanol fuel samples

G. F. Giordano, D. C. Melo Ferreira, T. Ribeiro de Carvalho, L. C. Silveira Vieira, M. Helena de Oliveira Piazzetta, R. S. Lima and A. L. Gobbi, Anal. Methods, 2014, 6, 9497 DOI: 10.1039/C4AY02255F

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